Draft applying tool for portable motor-blower units



Feb. 19, 1952 e. w. BREUER EI'AL 2,586,145

DRAFT APPLYING TOOL FOR PORTABLE MOTOR BLOWER UNITS Filed May 21, 1948 2 SHEETSSHEET l a zforizey 2 SHEETS-SHEET 2 Feb. 19, 1952 e. w. BREUER EIAL DRAFT APPLYING TOOL FOR PORTABLE MOTOR BLOWER UNITS Filed May 21, 1948 (Yar'ezifie Mlazzfey 02@@% M Patented Feb. 19, 1952 DRAFT- APPLYING TOOLFORPORTABLE 1M0'POIt-i-BILOWJEILUNITS Grant" W.""Breuer;iNorthbrook,. an'dI'Clarenc W. Lanten-Bartlettj' Ill., assign'ors"to BreuertElectric Manufacturing CompanyFChica'go," $111.," a corporationot Illinois Application'Maym, 194,8,- seiiamaassm (c1; res n) 8 .Glaims.

- 1 This invention relates tea .device. for: cleaning theatres, auditoriums and. the like, and: has. :for an object the provision of a relatively simplerinexpensive device .adapted to reduce i the i labor.

time and expense involved inperforming the i various cleaning operations.

To properly-cleana theatre, it is neoessary to remove the trash from .the .floor and .seats,. to

. clean plushseats with a vacuum cleaner, and-to spray-the floor andseats with a germicide. Heretofore, in performingathese, various operations, brooms andbrushes were employed for sweeping trash from thefioor andhouseholdetype vacuum .cleaners were employed for cleaning. thapliish seatsand for spraying the germicide. The time, effort and expense hereto-fore involved in removing trash from around and betweenthe. legs. of theatre seats by means of .brooms. and brushes, and incleaning and spraying seats by meansof household-type vacuum cleaners, is well known to those engaged in managing theatres.

The present invention contemplates the provision of an operable motor-blower unit adapted to be carried by the operator by means or a shoulder strap, the unitbeing'provided with an improved attachment for dislodging and collecting into an accumulated pile all the' boxes,paper andother" trash usually foundaroundand' between the legs of theatre seats at "the :end" bf a performance. Spraying'and vacuum cleanenat- "tachments are also provided for the unit, "thus providing a single unit adapted toreduce the labor and expense-of 'each of the several operations requiredin cleaning theatres.

-Itis a further ob'je'et of this invention tolprovide an operable motor-"blower unit 'e'mbodying a relatively long, irigid tubing :servingyasaanwair 1 outlet. conduit; the'ilower end of said. conduit. be-

ing connected :toan air. outlet nozzle which :is

- formed 'andadapted .to be positioned to direct a high-velocity stream of airalong the surface of a floor and substantiallyparallel thereto'solasnot to cause the streamof air to carry thedustand trash upwardly'over theseats. The-airaoutlet tubing, with attachednozzle, is particularlyusedetails of construction and arrangement'of parts which. i are hereinafter set forth in "the speci- 'fic'ation and claims and illustratedin the; accomv panying drawings, virherein:

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1;;2 "Fig. 1 is a perspective view'illustratingthej'device for ,cleaning ..theatres and the .manner of ..1ising..same.

.Eig52 isia sectional view taken alongjtheiline i Z i2;ofiEig;.1.

. Figw3gis. a. -sectional .vliewilt'aken falong ltheline 34-3. of." Fig. 2.

Fig.5 .4 is, a" .front..elevational view. partlyin sec- -.tion .showing a. noz'z'leand, means. for attaching sametolthe end lofeaerigidlcondiiit.

Fig, 5, is. adetail 'side elevational viewillustratingthemeans employed .for." detachably. connecting-the nozzle to'the rigid conduit.

Referring. now to the drawings. .for. a" better .=-.unders.tanding...of this invention, the ,l'deivice .ior cleaning theatres is shown .ascomp'iiSing a. portable. motor-blower comprising... an electric motor 6 anda centrifugal .blower; I. C'Ihembtor andblower may .be of anywell. known. construc- .-..tion,. such: as. that .disclosed.,in. our ctr-pending patent application. Serial No. 715,356, LfiledfMay 1, 1947, in which. the armature-shaf 1:. acts to drive ta centrifugal fandisposed withinthe-casing'. Bbf

the-blower. .1 The. casing. BciS. rprovidedwith .lthe iusuaia'xial air inletppening land tangential air .7 outletopening 1|. l. :A suitable handle I 2 .is. secured to the-motor 6; and is.adapted tobeiengagedbye I strap. l 3 whenethe. motoreblower. unit is supported by. the. operator.- as -.illustrated .in Fig. 1.

One end of a flexible rubber-...hose l4 ..is..con-

nected .torthetangential air outl'et 'l I. fofi'the blower i, and the other end. of. ithe-hose is .connectedto the rend. of ..a rigid. .tubTular .con'diiitf l 6. whichisis preferably formed .of. metal. "Detachably .connee-ted tolthe' lower end fof the rigidmetalconduit I6 is provided an "air outlet nozzle" "One end of the nozzle i1 is adapted to be telescopically en aged within theend ofjtherig'id tubular con- .diiit 16 by 'meansof' a' re'silientfinger I 8 which is bent inwardly at "l 9 for 'engageme'nt'in a recess 2 I "forindin the? nozzle. The resilientfinger l8 -is formed in"the""con'duit "l 6 "by'means or parallel slots2Z =22"and1atransverse slot 23. *A' tubular "sleeve i l "is mountedfor-snug telescopic movenrentalong th lower endof the rigid=-metal"-con- 'duit" l6. -"Whenthe*sleeve 24 is-dispoSedinits lower position as illustrated in 'Figs 3 and*- 4 "it serves tohold' the-resilient finger I8 againstout- *ward displacement; 'thebeaded' shoulder portion I9 then serves to engage the walls of the recess 2 rte" preve'nt displacement of-the nozzle '11 from 'theconduit. "When the sleeve 24 is-moved upwai-dly; 'the nozzle may be pulled outwardly from the conduit 1 B as the" finger I 8 is freeto be'iiis- -"placed outwardly. Toypreve'nt accidental nis- 'vice to the tangential air outlet ll.

L-shaped recess 28 to receive the head portion 21 of a pin 28. The pin 28 is mounted in an aperture provided in the conduit l6 and is adapted to be engaged in a slot 29 formed in the inner end of the nozzle H. The pin 28 serves to prevent rotational displacement of the nozzle l'l relative to the conduit l6.

The nozzle I1 is formed with an air passage-, way having a smaller cross-sectional area than the conduit l6 for the purposeof increasing the velocity of the air leaving the nozzle. The neck portion 3| of the nozzle is preferably formed circular in cross-section and intersects the outlet portion 32 which is formed to provide a passageway of gradually increasing width and gradually decreasing height to create a relatively fiat stream of air for passage alongthe fioor of a theatre. As illustrated in Fig. 3, the outlet portion 32 of the nozzle is disposed at an angle of approximately 60 from the longitudinal axis of the neck portion 3|.

In using the device thus described in cleaning a theatre, the motor-blower unit is supported upon the operator by means of the shoulder strap l3, and the rigid conduit I6 is disposed at an angle of approximately 30 to 45 from a vertical plane to direct a flat stream of air along and parallel to the fioor. As illustrated in Fig. 1, it will be noted that the nozzle end of the conduit [6 is adapted to be inserted between and around the legs 33 of seats 34 to dislodge and remove boxes, paper and other trash Without causing the operator to bend over. As the operator moves along between rows of seats, the stream of air passing from the nozzle l'l causes the trash to be blown toward a predetermined spot from which the trash may be collected for removal in suitable containers. The device thus described is also adapted for use as a vacuum cleaner for cleaning plush seats by attaching a dirt receptacle to the tangential air outlet II and attaching a vacuum cleaner hose to the air inlet 9. The device is also adapted for use in spraying germicides or insecticides by attaching a suitable spraying de- The construction, method of attachment and operation of vacuum cleaner attachments and spraying attachments on devices of this type is well known in the art and does not require further illustration or description.

While this invention has been shown in but one form, it is obvious to those skilled in the art that it is not so limited but is susceptible of various changes and modifications without departing from the spirit and scope of the claimed invention.

We claim as our invention:

1. In a draft applying tool for portable motorblower units, a rigid tubular conduit, a resilient finger provided on one end of said conduit, a nozzle having one of its ends telescopically engaged within the conduit and formed with a groove to receive the end of said finger, a pin provided on said conduit to engage said nozzle against rotation relative to the conduit, and a sleeve mounted for telescopic movement along said conduit to engage and prevent outward displacement of the finger from the groove formed in the nozzle.

2. In a draft applying tool for portable motorblower units, a rigid tubular conduit, a resilient finger provided on one end of said conduit, a

.nozzle having one of its ends telescopically engaged within the conduit and formed with a vided on said conduit to engage said nozzle against rotation relative to the conduit, and a sleeve mounted for telescopic movement along said conduit to engage and prevent outward displacement of the finger from the groove formed in the nozzle, the inner end of said nozzle being formed with a recess to receive the inner end of said pin.

3. In a draft applying tool for portable motorblower units, a rigid tubular conduit, a resilient finger provided on one end of said conduit, a nozzle having one of its ends telescopically engaged within the conduit and formed with a groove to receive the end of said finger, a pin provided on said conduit to engage said nozzle against rotation relative to the conduit, a sleeve mounted for telescopic movement along said conduit to engage and prevent outward displacement of the finger from the groove formed in the nozzle,

.the inner end of said nozzle being formed with a recess to receive the inner end of said pin, and

-means on said sleeve to engage the outer end of gaged within the conduit and formed with a groove to receive the end of said finger, a pin provided on said conduit to engage said nozzle against rotation relative to the conduit, a sleeve mounted for telescopic movement along said conduit to engage and prevent outward displacement of the finger from the groove formed in the nozzle, the inner end of said nozzle being formed with a recess to receive the inner end of said pin, and means on said sleeve to engage the outer end of said pin to prevent accidental displacement of said sleeve relative to said conduit, said means comprising an L-shaped recess formed in the sleeve.

5. In a draft applying tool for portable motorblower units, a rigid tubular conduit, a resilient finger provided on one end of said conduit, a

nozzle having one of its ends telescopically engaged within the conduit and formed with a groove to receive the end of said finger, a pin sleeve mounted for telescopic movement along said conduit to engage and prevent outward displacement of the finger from the groove formed 55 in the nozzle, the other end of said nozzle being angularly disposed with respect to said conduit and forming a restricted passageway of smaller area than the area of the conduit.

6. In a draft applying tool for portable motorblower units, a rigid tubular conduit, a resilient finger provided on one end of said conduit, a nozzle having one of its ends telescopically engaged within the conduit and formed with a groove to receive the end of said finger, a pin provided on said conduit to engage said nozzle against rotation relative to the conduit, and a sleeve mounted for telescopic movement along said conduit to engage and prevent outward displacement of the finger from the groove formed in the nozzle,,the other end of said nozzle having a greater width than thickness and being anguiormingla restricted passageway of smaller area than the area of the conduit. 7 I

7. In a draft applying tool for portable motorblower units, a rigid tubular conduit, a resilient finger provided on one end of said conduit, a nozzle having one of its ends telescopically en' gaged within the conduit and formed with a groove to receive the end of said finger, a pin provided on said conduit to engage said nozzle against rotation relative to the conduit, and a sleeve mounted for telescopic movement along said conduit to engage and prevent outward displacement of the finger from the groove formed in the nozzle, the other end of said nozzle having a greater Width than thickness and being angularly disposed with respect to said conduit and forming a restricted passageway of smaller area than the area of the conduit, said tubular conduit being of suflicient length to extend at an angle from a floor to the hand of a man standing erect when the nozzle is resting upon the floor.

8. In a draft applying tool for portable motorblower units, a rigid tubular conduit, a resilient finger provided on one end of said conduit, a nozzle having one of its ends telescopically engaged within the conduit and formed with a groove to receive the end of said finger, a pin provided on said conduit to engage said nozzle against rotation relative to the conduit, a sleeve mounted for telescopic movement along said conduit to engage and prevent outward displacement of the finger from the groove formed in the nozzle, the inner end of said nozzle being formed with a recess to receive the inner end of said pin, and means on said sleeve to engage the outer end of said pin to prevent accidental displacement of said sleeve relative to said conduit, said means comprising an L-shaped recess formed in the sleeve, the other end of said nozzle having a greater width than thickness and being angularly disposed with respect to said conduit and forming a restricted passageway of smaller area than the area of the conduit, said tubular conduit being of sufficient length to extend at an angle from a floor to the hand of a man standing erect when the nozzle is resting upon the floor.

GRANT W. BREUER. CLARENCE W. LANTER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 636,375 Beariks Nov. 7, 1899 834,925 Minturn Nov. 6, 1906 1,144,931 Boogher June 29, 1915 1,330,547 Mehlhaf Feb. 10, 1920 1,583,528 Clements May 4, 1926 1,666,350 Pitt Apr. 17, 1928 1,877,388 Coelho Sept. 13, 1932 1,949,904 Guedel Mar. 6, 1934 2,024,367 Eriksson-Jons Dec. 17, 1935 2,320,964 Yates June 1, 1943 FOREIGN PATENTS Number Country Date 246,961 Germany May 15, 1912 

